Both open frame and enclosed versions are free-air convection cooled and incorporate a number of features designed to ensure that constant power is available in the event of mains failure. These include “auto switch” when power off, battery low protection, battery polarity protection, brown-out (AC input low) protection and an integral constant current limiting circuit.
Other significant features include alarm signals for AC OK and battery low, as well as short circuit, overload and overvoltage protection. Both PQP and PQE Series meet all relevant safety and EMI/EMS standards.
The enclosed PQE Series measures 129.5 x 97.5 x 37.5mm, the open frame PQP Series 123 x 95 x 31, with connection by screw terminals.